bp_enable_site_registration( bool $default = false )

function bp_enable_site_registration( $default = false ) {

	/**
	 * Filters whether or not the registration enable.
	 *
	 * @since BuddyPress 1.6.0
	 *
	 * @param bool $value Whether or not the registration enable.
	 */
	return (bool) apply_filters( 'bp_enable_site_registration', (bool) bp_get_option( 'bp-enable-site-registration', $default ) );
}